X-Ray Eclipses of Active Galactic Nuclei [PDF]
The Astrophysical Journal, 2017 X-ray variation is a ubiquitous feature of active galactic nuclei (AGNs), however, its origin is not well understood. In this paper, we show that the X-ray flux variations in some AGNs, and correspondingly the power spectral densities (PSDs) of the ...
Fupeng Zhang, Qingjuan Yu, Youjun Lu
core +5 more sources
Review on Active-Galactic Nuclei at hard X-ray energies [PDF]
Proceedings of An INTEGRAL view of the high-energy sky (the first 10 years) - 9th INTEGRAL Workshop and celebration of the 10th anniversary of the launch — PoS(INTEGRAL 2012), 2013 Hard X-ray surveys are an important tool for the study of active galactic nuclei (AGN): they provide almost an unbiased view of absorption in the extragalactic population, allow the study of spectral features such as reflection and high energy cut-off ...
L. Bassani +8 more
core +4 more sources
X-ray bolometric corrections for Compton-thick active galactic nuclei [PDF]
The Astrophysical Journal, 2017 We present X-ray bolometric correction factors, $\kappa_{Bol}$ ($\equiv L_{Bol}/L_X$), for Compton-thick (CT) active galactic nuclei (AGN) with the aim of testing AGN torus models, probing orientation effects, and estimating the bolometric output of the ...
Ballantyne, D. R. +18 more
core +12 more sources
X-ray emission of z > 2.5 active galactic nuclei can be obscured by their host galaxies [PDF]
Astronomy & Astrophysics, 2019 We present a multiwavelength study of seven active galactic nuclei (AGN) at spectroscopic redshift >2.5 in the 7 Ms Chandra Deep Field South that were selected for their good far-infrared (FIR) and submillimeter (submm) detections.
C. Circosta +8 more
openalex +3 more sources
Ensemble X-ray variability of Active Galactic Nuclei. II. Excess Variance and updated Structure Function [PDF]
, 2016 Context. Most investigations of the X-ray variability of active galactic nuclei (AGN) have been concentrated on the detailed analyses of individual, nearby sources.
F. Vagnetti +4 more
openalex +3 more sources
New active galactic nuclei among the INTEGRAL and SWIFT X-ray sources [PDF]
, 2008 We present the results of the optical identifications of a set of X-ray sources from the all-sky surveys of INTEGRAL and SWIFT observatories. Optical data were obtained with Russian-Turkish 1.5-m Telescope (RTT150).
R. Burenin +6 more
openalex +5 more sources
Force Multiplier Calculations for X-ray Binaries and Active Galactic Nuclei
, 2020 Motivated by the work done to explore the winds from hot stars (Lamers & Cassinelli 1999), we develop a method for self consistently calculating force multipliers for Type 1 and Type 2 active galactic nuclei (AGN), soft and hard start X-ray binaries ...
Randall Dannen
openalex +3 more sources
Host galaxy properties of X-ray active galactic nuclei in the local Universe [PDF]
Astronomy & Astrophysics, 2021 We study the host galaxy properties of active galactic nuclei (AGN) that have been detected in X-rays in the nearby Universe ( z < 0 . 2). For that purpose, we use the catalogue provided by the ROSAT-2RXS in the 0.1–2.4keV energy band, one of the largest
L. Koutoulidis +4 more
semanticscholar +1 more source
Reverberation mapping of active galactic nuclei: from X-ray corona to dusty torus [PDF]
iScience, 2021 Summary The central engines of active galactic nuclei (AGNs) are powered by accreting supermassive black holes, and while AGNs are known to play an important role in galaxy evolution, the key physical processes occur on scales that are too small to be ...
E. Cackett, M. Bentz, E. Kara
semanticscholar +1 more source
Comprehensive Broadband X-Ray and Multiwavelength Study of Active Galactic Nuclei in 57 Local Luminous and Ultraluminous Infrared Galaxies Observed with NuSTAR and/or Swift/BAT [PDF]
Astrophysical Journal Supplement Series, 2021 We perform a systematic X-ray spectroscopic analysis of 57 local luminous and ultraluminous infrared galaxy systems (containing 84 individual galaxies) observed with the Nuclear Spectroscopic Telescope Array and/or Swift/BAT.
S. Yamada +6 more
semanticscholar +1 more source